Wilden PS8 (2-1/2" Tri-Clamp) Saniflo FDA AODD PumpThe Wilden PS8 Saniflo FDA Air Operated Double Diaphragm pump is designed specifically for sanitary applications. The PS8 has stainless steel wetted parts, 2 1 2" Tri Clamp connections, and features Wilden's state of the art Proflo Shift technology. The Pro Flo SHIFT is an upgraded air intake system based on Wilden's Pro Flo design. The SHIFT reduces air consumption by up to 60% by eliminating overfilling of the air chambers, saving energy and money.